Along the way, Shi'a is thinking about how to arrange tomorrow. Now there are villages on the way forward, which means they can't explore the road openly. However, it's still unknown where this place is. This village is just stuck on their way to the East. If they want to continue to move eastward, they have to pass through the valley in front of this hillside village. In that case, they will surely know about it.

After thinking for a long time, Shi a finally made up his mind. He said to Tian zhe: "Tian Qu Chang, I would have decided to start all night and continue to go east along the path in front of the village. I will definitely come back in three to five days at most. If I don't know exactly where this place is, I will be in vain for my time and energy."

"General!" As soon as Tian zhe heard this, he knew that Shi a was going to go alone. He was worried and said, "is it too dangerous for the general to go alone?"

"It's OK. Before I followed my master, I once went into the world alone, so I don't have to worry about Tian Qu Chang. You stay here, and I will come back in three or five days. No, it's too close to the hillside village. You can go back for another day and wait for me at the place where we camped yesterday! "

Shi A's level is too different from his own. In addition, he is a confidant of the king and a disciple of the greatest Xia in the world. Tian zhe also knows Shi A's ability, so he doesn't advise him any more. Just ask Shia to go back to the campsite, prepare some things, and then leave at night.

Soon they went back to the camp. Shi a quickly prepared some clothes and food, took some coins and rushed to the East. Finally, before the sun came out, he bypassed the foot of the hillside village and came to the east of the mountain.

Because the people in the hillside village often seem to contact with the outside world, it's much better for Shi a to walk in the mountains than before. From this village, there is a path connecting with the outside, and Shi a follows the path all the way to the East.

One day later, Shi'a finally arrived at a place where he was very excited - gaopingguan. Looking at the tattered wall of the pass and the big words "Gaoping pass" on the wall, Shi a knows that he has finally successfully found the ancient road of Qin State in the west of Baixing.

As the spy chief of the Tang Dynasty, Shi a basically knew everything about the Han Dynasty. In his impression, gaopingguan was just a pass in the west of Peishi County under the rule of Shangdang in Bingzhou. However, according to the information from the shadow, there were not many troops stationed in gaopingguan.

The reason why the situation of gaopingguan is so clear is that the state of Tang is sure to win Bingzhou. To enter Bingzhou, there are only two ways. One is to go to Hedong and enter Quemo Valley and Taiyuan. The other is to go to Hanoi and enter Shangdang territory through tianjingguan and mengmengmengmen pass in the eighth Xing of Taihang. Therefore, it takes a lot of money for the shadow guards to enter Gaodu and other cities It's hard to gather information.

Gaopingguan is located in Laomaling, 15 kilometers southwest of Gaoping City, which reaches Youyan in the north, Yiluo in the South and Hedong in the West. "According to the ridge of the world, it is the throat of Heshuo". It is the traffic throat and military hub of Shangdang area, and has always been an important place of attack and defense in history.

Laomaling, also known as kongcangling, is located in machun town and Yuancun Township, 17.5km southwest of Gaoping City. It is the boundary mountain between Qinling and Gaoling. It starts from the main road in the East, ends at Heihu temple in the west, starts from shanhebei in the north, and connects Wushen mountain in the south. It covers an area of 2.5 square kilometers, with an altitude of 1188 meters. Laomaling has undulating peaks, high peaks and steep cliffs. It is as majestic as a galloping horse.

The terrain here is very dangerous. The valley is deep and the cliff is steep. The East and the West are valleys. There are deep streams on the left and steep cliffs on the right. The mountain peaks on the north and south sides of the pass face each other. There is only one way to get through cars and horses in the middle. Gaoping pass is the gateway to the southwest of Gaoping. It is known as the first pass in the three Jin Dynasty and an important military fortress in ancient times. The castle of kongcangling is no longer in existence, but its remains can still be seen vaguely after climbing.

Gaoping Guandong to jianbudui, West to Heihu temple, about 1000 meters long, north to behind the pier, South to Wushen mountain, about 350 meters wide. There are two gates in Guancheng, the East and the West. There is still a section of Ming Dynasty city wall in the present site, and the site of the city can be discerned. The sites of star watching platform, point general platform and military training ground still exist. There are Wanzhao mountain, the whole temple, Guandi temple, Heihu temple, Huashiban and other natural landscapes and places of interest.

Gaopingguan first appeared in historical books because of the battle of Changping. According to the relevant epic records, the Qin army built a fake granary here to deceive the Zhao army, so it was later called kongcangling. However, it was not until the late Zhou Dynasty, when Zhao Kuangyin, the founding emperor of the Song Dynasty, rode alone to gaopingguan and borrowed his head from Gao Laoyao, which made gaopingguan famous all over the world.

Then, during the Anti Japanese War, the island army suffered a heavy blow from the 17th division of the revolutionary army. Many soldiers died bravely for their country and wrote a patriotic anthem.

However, gaopingguan at this time was far less brilliant than later. Although gaopingguan at this time also had the defense of Bingzhou army, according to Shi A's observation, there were no more than a few hundred Bingzhou troops stationed here, and it seemed that they were basically ordinary soldiers, not the most elite soldiers under Lv Bu's command.

According to Shi A's observation, it is basically certain that there are no more than 500 soldiers stationed at gaopingguan. It is estimated that there should be a thousand soldiers department. Among them, there are more than 100 real elite soldiers, and the remaining 400 soldiers are mostly made up.In fact, it's true that Gaoping pass is a pass within the Shangdang. Although it's a pass to the west of Yu's family, there are only vast mountains to the West. When the yellow scarf was rampant, the Shangdang Taishou arranged soldiers to defend against the yellow scarf thieves. Later, after Lu Bu occupied the upper party, he appointed Zhang Yang as the leader of the upper party and Hao Yin as the captain of the upper party. However, they both set their eyes on Hanoi in the south, and did not pay attention to gaopingguan at all.

Shi a stayed in Gaoping pass for a day, then left the pass at dusk, and then left the pass overnight. Finally, on the fourth day, he arrived at the camp where Tian Zhe and his party stayed. After telling Tian zhe the situation here, Shi a ordered Tian Zhe and Zhang Ming to lead them back to Hedong, while he himself went east again after a night's rest However, if he is ready to attack the Shangdang, he is ready to sneak into the Shangdang himself and command the shadow guards of the Shangdang to make sure of the troops and defense of the city within the Shangdang territory.

Half a month later, Zhang Ming and Tian zhe finally led their party back to Hedong. After entering DuanShi City, they were protected by the elite soldiers of Yingyang army who had been waiting for a long time. After a day's rest in DuanShi City, they were escorted to Anyi City, Hedong Zhisuo.

As soon as they returned to Anyi, they were recruited by Zhang Chao and Tian Yu to inquire about the details of their journey. Later, the detailed information was written into a memorial by the two men and sent back to Luoyang overnight.